Results 31 to 40 of about 313,766 (176)
International Journal of Antennas and Propagation, 2014 Reflector antennas have been widely used in many areas. In the implementation of parabolic reflector antenna for broadcasting satellite applications, it is essential for the spacecraft antenna to provide precise contoured beam to effectively serve the ...
N. H. Abd Rahman +4 more
doaj +1 more source
Dual-Polarized Multi-Beam Fixed-Frequency Beam Scanning Leaky-Wave Antenna
Sensors, 2023 A fixed-frequency beam-scanning leaky-wave antenna (LWA) array with three switchable dual-polarized beams is proposed and experimentally demonstrated. The proposed LWA array consists of three groups of spoof surface plasmon polaritons (SPPs) LWAs with ...
Dapeng Chu +4 more
doaj +1 more source
A Multibeam Solar Grid Antenna Integrated With Monocrystalline Silicon Solar Cell
IEEE Open Journal of Antennas and PropagationThis paper proposes a multibeam grid antenna integrated with a monocrystalline silicon solar panel first time, which consists of a grid antenna in microstrip form and a monocrystalline silicon solar cell.
Fuwei Wang +5 more
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Some Contributions for Antenna 3D Far Field Characterization at Terahertz
Sensors, 2021 The three-dimensional (3D) characterization of antenna far field patterns at terahertz frequencies is addressed. This task is challenging, because the phase of the electric field is difficult to measure accurately and reliably.
Laurent Le Coq +3 more
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In Situ Two‐Dimensional Residual Stress Characterization of Thin Films
Advanced Materials Technologies, EarlyView.An integrated in situ curvature metrology platform combining speckle‐based curvature optical metrology (SCOM) with multi‐beam optical sensors (MOS) enables spatially resolved two‐dimensional curvature mapping of thick sputtered coatings. The SCOM technique provides excellent agreement with MOS while providing an extended measurable curvature range ...
Wai Jue Tan +6 more
wiley +1 more source
Scanning Parametric Sediment Echosounder as Tool for Underwater Archaeological Prospection
Archaeological Prospection, EarlyView.ABSTRACT Underwater cultural heritage 3D prospection techniques, especially for remains that are partly buried in the ground, are only very rarely available and often can only be applied with considerable technical effort. To overcome this limitation, we evaluate a methodological adaption of widely used and available single channel parametric sediment ...
Dennis Wilken +5 more
wiley +1 more source
3x3 Multibeam Network for a Triangular Array of Three Radiating Elements [PDF]
, 2011 A multibeam antenna study based on Butler network will be undertaken in this document. These antenna designs combines phase shift systems with multibeam networks to optimize multiple channel systems.
Novo Garcia, A. +3 more
core
The performance enhancement of multibeam adaptive base-station antennas for cellular land mobile radio systems [PDF]
, 1990 The problem of meeting the proliferating demands for mobile telephony within the confinement of the limited radio spectrum allocated to these services is addressed.
MCGEEHAN, J +11 more
core +1 more source
FlexMat, EarlyView.Abstract Soft robots, engineered from highly compliant materials, offer superior adaptability and safety in unstructured environments compared to their rigid counterparts. Recent advancements, fueled by bio‐inspiration and material programmability, have led to the rapid co‐evolution of their core modules: actuation, sensing, protection, energy, and ...
Qiulei Liu +3 more
wiley +1 more source
Multibeam Wideband Transmit Beamforming Using 2D Sparse FIR Trapezoidal Filters
Journal of Low Power Electronics and ApplicationsA low-complexity multibeam wideband transmit beamformer using a 2D sparse FIR filter design capable of multiple beams is proposed as a digital building block for fully digital beamformers.
Nadeeshan Dissanayake +3 more
doaj +1 more source